Single-molecule conductance with nitrile and amino contacts with Ag or Cu electrodes

被引：8
|
作者：
Li, Dong-Fang [1 ]
Mao, Jin-Chuan [1 ]
Chen, De-Li [1 ]
Chen, Fang [1 ]
Hong, Ze-Wen [1 ]
Zhou, Xiao-Yi [1 ]
Wang, Ya-Hao [1 ]
Zhou, Xiao-Shun [1 ]
Niu, Zhen-Jiang [1 ]
Maisonhaute, Emmanuel [2 ]
机构：
[1] Zhejiang Normal Univ, Inst Phys Chem, Minist Educ Adv Catalysis Mat, Key Lab, Jinhua 321004, Zhejiang, Peoples R China
[2] Univ Paris 06, Univ Sorbonne, Lab Interfaces & Syst Electrochim, CNRS,UMR 8235, F-75005 Paris, France
来源：
ELECTROCHIMICA ACTA | 2015年 / 174卷
基金：
中国国家自然科学基金;
关键词：
Electrochemical STM-BJ; Silver; Copper; Amino group; Nitrile group; JUNCTION CONDUCTANCE; CHARGE-TRANSPORT; DEPENDENCE; WIRES; AU;
D O I：
10.1016/j.electacta.2015.06.018
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The single-molecule conductance of 1,4-dicyanobenzene (DCB), 1,4-benzenediamine (BOA) and 4,4'-biphenyldicarbonitrile (BPDC) with Ag and/or Cu electrodes is measured by electrochemical jump-tocontact STM-break junction. All single-molecule junctions present three sets of conductance values revealing different contact geometries. We observe that the single-molecule conductance of Ag-BOA-Ag junction is larger that of Ag-DCB-Ag junction, and DCB with Ag contacts are more conductive than that with Cu ones. This is related to a different electronic coupling between the molecules and the electrodes. Tunneling decay constants of 1.70 and 1.68 per phenyl group were found for Ag and Cu electrodes, respectively. The present study therefore shows that nitrile and amino groups can also be used as effective anchors for other metals than gold. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：340 / 344
页数：5
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